8993407865 has 16 divisors (see below), whose sum is σ = 11742075408. Its totient is φ = 6572814336.

The previous prime is 8993407853. The next prime is 8993407879. The reversal of 8993407865 is 5687043998.

It can be written as a sum of positive squares in 8 ways, for example, as 868624 + 8992539241 = 932^2 + 94829^2 .

It is a cyclic number.

It is not a de Polignac number, because 8993407865 - 2¹⁰ = 8993406841 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 706892 + ... + 719501.

It is an arithmetic number, because the mean of its divisors is an integer number (733879713).

Almost surely, 2^8993407865 is an apocalyptic number.

It is an amenable number.

8993407865 is a deficient number, since it is larger than the sum of its proper divisors (2748667543).

8993407865 is a wasteful number, since it uses less digits than its factorization.

8993407865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426508.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The square root of 8993407865 is about 94833.5798385783. The cubic root of 8993407865 is about 2079.5758399922.

The spelling of 8993407865 in words is "eight billion, nine hundred ninety-three million, four hundred seven thousand, eight hundred sixty-five".